Abstract:
The NCEP/NCAR Reanalysis project is using a state-of-the-art analysis/forecast system to perform data assimilation using past data from 1948 to the present. A subset of this data has been processed to create monthly means of a subset of the original data. There are also files containing data from variables derived from the reanalysis and some other statistics. ... Information about the 4 times and daily data is available, as well. Please read the problem list before using the data. The NCEP/NCAR Reanalysis descriptions here are subdivided into separate categories. These are currently: Pressure Level Data Surface Data Surface Flux Data Other Flux Data Tropopause Level Data Sigma Level Data If you don't know where to find a variable, you can search this table. All the files are in netcdf format and are located in the directories that follow the naming convention: /Datasets/ncep.reanalysis.derived/subdirectory_name/ where subdirectory_name is Categorysubdirectory_name Pressure levelpressure Surfacesurface Surface Fluxsurface_gauss Other Fluxother_gauss Tropopausetropopause Sigma Levelspectral The naming convention of the files is generally variable.averagingperiod.statistic.nc where variable is netcdf variable name averagingperiod is time period over which data is averaged (day,mon) statistic is type of data (mean, long-term mean(ltm), etc) Some files have the level included with the variable names e.g. air2m.mon.mean.nc Here the file should be read with the variable of 'air' Information is available on the time period of the files and how the different statistics were calculated.